You can find it in every small scene that lives at the fringe of legality. These tend to attract a very specific kind of weirdo with extreme personalities and when those weirdos also happen to have the chops necessary for translating obscure Super Famicom games and building passable emulators you immediately have ego issues and the dramas that come with them.

Sure, there are lots of people who load their translated roms into emulators without any drama, but they are just as part of the emulation scene as torrent users are part of the warez scene. It is how much you are involved.